.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 10, 26, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  z-index: 1000;
  gap: 8px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-logo {
  font-size: 1.8rem;
  animation: rocketBob 2s ease-in-out infinite;
}

.nav-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  background: linear-gradient(135deg, var(--cyan), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 4px;
  margin-left: auto;
  margin-right: 8px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--white-dim);
  transition: all var(--transition-med);
  white-space: nowrap;
  min-height: var(--touch-min);
  display: flex;
  align-items: center;
}

.nav-link:hover {
  color: var(--white);
  background: var(--cyan-dim);
}

.nav-link.active {
  color: var(--cyan);
  background: var(--cyan-dim);
  box-shadow: inset 0 0 10px rgba(0, 229, 255, 0.1);
}

.sound-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-med);
  flex-shrink: 0;
}

.sound-btn:hover {
  background: var(--cyan-dim);
  box-shadow: var(--shadow-glow-cyan);
}

/* Mobile tab bar */
.mobile-tab-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-tab-height);
  background: rgba(10, 10, 26, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--glass-border);
  z-index: 1000;
  justify-content: space-around;
  align-items: center;
  padding: 4px 0;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  color: var(--white-dim);
  font-size: 0.7rem;
  font-weight: 700;
  transition: all var(--transition-med);
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  justify-content: center;
}

.tab-item.active {
  color: var(--cyan);
}

.tab-icon {
  font-size: 1.3rem;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-title {
    font-size: 1rem;
  }

  .mobile-tab-bar {
    display: flex;
  }
}